AGTHX vs FSKAX: 48% overlap
American Funds Growth Fund of America A and Fidelity Total Market Index share 48.1% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
You would hold two tickers and get the diversification of 1.5. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
AGTHX and FSKAX hold 229 of the same securities. The ten contributing most to the overlap figure:
| Holding | in AGTHX | in FSKAX | Δ |
|---|---|---|---|
| NVDA | 6.1% | 6.5% | 0.4% |
| MSFT | 4.0% | 4.4% | 0.3% |
| AMZN | 2.9% | 3.1% | 0.2% |
| GOOGL | 2.9% | 2.7% | 0.2% |
| AVGO | 4.3% | 2.3% | 2.0% |
| GOOG | 2.9% | 2.2% | 0.8% |
| META | 4.2% | 2.1% | 2.1% |
| AAPL | 1.8% | 5.9% | 4.0% |
| TSLA | 2.6% | 1.7% | 0.9% |
| LLY | 3.3% | 1.3% | 2.1% |
Where AGTHX and FSKAX differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | AGTHX | FSKAX | Δ |
|---|---|---|---|
| Financials | 6.5% | 12.2% | −5.7pp |
| Unclassified | 7.6% | 4.0% | +3.6pp |
| Communication Services | 13.2% | 9.7% | +3.5pp |
| Consumer Discretionary | 12.7% | 9.6% | +3.1pp |
| Consumer Staples | 2.4% | 5.1% | −2.7pp |
| Utilities | 0.5% | 2.4% | −1.9pp |
| Real Estate | 0.6% | 2.4% | −1.8pp |
| Energy | 1.9% | 3.5% | −1.5pp |
Δ is AGTHX minus FSKAX, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
18.5% of AGTHX by weight, held in no part of FSKAX.
33.9% of FSKAX by weight, held in no part of AGTHX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| AGTHX | FSKAX | |
|---|---|---|
| Top 10 holdings | 36.7% | 32.1% |
| Positions held | 309 | 3,754 |
| Cost per $10,000 held, per year | $61 | $1 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do AGTHX and FSKAX overlap?
AGTHX and FSKAX overlap 48.1% by portfolio weight — moderate overlap. They share 229 holdings. The figure comes from current issuer holdings files (AGTHX as of 2026-02-28, FSKAX as of 2026-02-28).
How is the overlap between AGTHX and FSKAX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If AGTHX holds a stock at 6% and FSKAX holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both AGTHX and FSKAX?
That depends on your goals — we state facts, not advice. At 48.1% overlap, each fund still contributes meaningfully distinct exposure.
What does AGTHX own that FSKAX doesn't?
AGTHX holds 309 positions and FSKAX holds 3,754; 79 of AGTHX's positions don't appear in FSKAX at all, and they are 18.5% of AGTHX by weight.
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Related comparisons
Sources: issuer holdings files, AGTHX as of 2026-02-28, FSKAX as of 2026-02-28. Weights are fractions of each fund. Diagnostics, not advice.